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/** @file
Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Library/SpiFlashCommonLib.h>
#include <Library/IoLib.h>
#include <Library/PciLib.h>
#include <Protocol/Spi.h>
EFI_SPI_PROTOCOL *mSpiProtocol;
//
// FlashAreaBaseAddress and Size for boottime and runtime usage.
//
UINTN mFlashAreaBaseAddress = 0;
UINTN mFlashAreaSize = 0;
/**
Enable block protection on the Serial Flash device.
@retval EFI_SUCCESS Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
SpiFlashLock (
VOID
)
{
return EFI_SUCCESS;
}
/**
Read NumBytes bytes of data from the address specified by
PAddress into Buffer.
@param[in] Address The starting physical address of the read.
@param[in,out] NumBytes On input, the number of bytes to read. On output, the number
of bytes actually read.
@param[out] Buffer The destination data buffer for the read.
@retval EFI_SUCCESS Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
SpiFlashRead (
IN UINTN Address,
IN OUT UINT32 *NumBytes,
OUT UINT8 *Buffer
)
{
ASSERT ((NumBytes != NULL) && (Buffer != NULL));
if ((NumBytes == NULL) || (Buffer == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// This function is implemented specifically for those platforms
// at which the SPI device is memory mapped for read. So this
// function just do a memory copy for Spi Flash Read.
//
CopyMem (Buffer, (VOID *) Address, *NumBytes);
return EFI_SUCCESS;
}
/**
Write NumBytes bytes of data from Buffer to the address specified by
PAddresss.
@param[in] Address The starting physical address of the write.
@param[in,out] NumBytes On input, the number of bytes to write. On output,
the actual number of bytes written.
@param[in] Buffer The source data buffer for the write.
@retval EFI_SUCCESS Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
SpiFlashWrite (
IN UINTN Address,
IN OUT UINT32 *NumBytes,
IN UINT8 *Buffer
)
{
EFI_STATUS Status;
UINTN Offset;
UINT32 Length;
UINT32 RemainingBytes;
ASSERT ((NumBytes != NULL) && (Buffer != NULL));
if ((NumBytes == NULL) || (Buffer == NULL)) {
return EFI_INVALID_PARAMETER;
}
ASSERT (Address >= mFlashAreaBaseAddress);
Offset = Address - mFlashAreaBaseAddress;
ASSERT ((*NumBytes + Offset) <= mFlashAreaSize);
Status = EFI_SUCCESS;
RemainingBytes = *NumBytes;
while (RemainingBytes > 0) {
if (RemainingBytes > SECTOR_SIZE_4KB) {
Length = SECTOR_SIZE_4KB;
} else {
Length = RemainingBytes;
}
Status = mSpiProtocol->FlashWrite (
mSpiProtocol,
FlashRegionBios,
(UINT32) Offset,
Length,
Buffer
);
if (EFI_ERROR (Status)) {
break;
}
RemainingBytes -= Length;
Offset += Length;
Buffer += Length;
}
//
// Actual number of bytes written
//
*NumBytes -= RemainingBytes;
return Status;
}
/**
Erase the block starting at Address.
@param[in] Address The starting physical address of the block to be erased.
This library assume that caller garantee that the PAddress
is at the starting address of this block.
@param[in] NumBytes On input, the number of bytes of the logical block to be erased.
On output, the actual number of bytes erased.
@retval EFI_SUCCESS. Opertion is successful.
@retval EFI_DEVICE_ERROR If there is any device errors.
**/
EFI_STATUS
EFIAPI
SpiFlashBlockErase (
IN UINTN Address,
IN UINTN *NumBytes
)
{
EFI_STATUS Status;
UINTN Offset;
UINTN RemainingBytes;
ASSERT (NumBytes != NULL);
if (NumBytes == NULL) {
return EFI_INVALID_PARAMETER;
}
ASSERT (Address >= mFlashAreaBaseAddress);
Offset = Address - mFlashAreaBaseAddress;
ASSERT ((*NumBytes % SECTOR_SIZE_4KB) == 0);
ASSERT ((*NumBytes + Offset) <= mFlashAreaSize);
Status = EFI_SUCCESS;
RemainingBytes = *NumBytes;
Status = mSpiProtocol->FlashErase (
mSpiProtocol,
FlashRegionBios,
(UINT32) Offset,
(UINT32) RemainingBytes
);
return Status;
}
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